Adjustment mechanism for chairs

Details Adjustment mechanism for chairs Adjustment mechanism for chairs

1988-12-08

1990-07-03

Cranmer, Laurie K.

Chairs and seats

Back movement resiliently opposed in operating position

Back and seat adjust simultaneously

297306, A47C 1032

Patent

active

049385313

ABSTRACT:
This device relates to an adjustment mechanism for adjusting the angular positions of a seat and a back rest of a chair. The mechanism comprises a fixed horizontal beam having a seat support member pivotally connected thereto by a transverse pivot adjacent one end of the beam and a back support member pivotally connected to the seat support member by a second transverse pivot. Opposed adjacent ends of the fixed beam and the back support member have spaced plates fixed at their adjacent ends with elongate aligned apertures. Locking means are mounted on the seat support member extending through the aligned apertures for locking the plates on the seat support member and the back support member into selected angular positions with respect to the horizontal beam.

REFERENCES:
patent: 3034828 (1962-05-01), Kurihara
patent: 3672721 (1972-06-01), Williams
patent: 3945651 (1976-03-01), Boswinkle
patent: 3989297 (1976-11-01), Kerstholt
patent: 4062587 (1977-12-01), Wolters
patent: 4198094 (1980-04-01), Bierkues et al.
patent: 4438978 (1984-03-01), Arild
patent: 4627662 (1986-12-01), Carter et al.
patent: 4629249 (1986-12-01), Yamaguchi
patent: 4636004 (1987-01-01), Neumuller
patent: 4682815 (1987-07-01), Steifensand

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